The Great Wall of China, one of the greatest wonders of the world. Just like a gigantic dragon, built originally to protect the northern borders of the Chinese Empire against intrusions by various nomadic groups. The Great Wall winds up and down across deserts, grasslands, mountains and plateaus, stretching approximately 8,851.8 kilometers (5,500 miles) from east to west of China. With a history of more than 2000 years, some of the sections are now in ruins or have disappeared. However, it is still one of the most appealing attractions all around the world owing to its architectural grandeur and historical significance.